Formation and Migration Energies of Monovacancies in Tantalum
- 22 August 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 39 (8), 484-487
- https://doi.org/10.1103/physrevlett.39.484
Abstract
Vacancies in thermal equilibrium were investigated by measuring the Doppler broadening of the positron-annihilation line of Ta from 35 K to the melting temperature. Experimental evidence for detrapping of positrons from vacancies at high temperatures was found. The consequences of the values obtained for monovacancy-formation and -migration enthalpies, eV, eV, for the interpretation of radiation damage and cold-work experiments are discussed.
Keywords
This publication has 20 references indexed in Scilit:
- Positron trapping in indiumApplied Physics A, 1977
- On the question of self-trapping of positrons in indiumPhysics Letters A, 1977
- Positron lifetimes and annihilation lineshape in Cd and au from 4.2 K to the melting pointsApplied Physics A, 1977
- Integrated source-specimen system for high-temperature positron annihilation experimentsApplied Physics A, 1976
- Vacancy formation energies from positron trapping measurementsApplied Physics A, 1976
- The temperature dependence of the diffusion coefficient and of the trapping rate of positrons in metalsApplied Physics A, 1975
- Self-trapping of positively charged particles in metalsApplied Physics A, 1975
- Monovacancy formation energy in copper, silver, and gold by positron annihilationApplied Physics A, 1975
- Vacancy-Formation Energies in Metals from Positron AnnihilationPhysical Review Letters, 1972
- Point defects in body-centered cubic transition metalsMaterials Science and Engineering, 1968